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Still more on ocean crust and density: the subduction zone near location "4" is where plate motion is pushing old, cold ocean crust (4) and continent crust (5) together. The ocean crust is the more dense, so it moves underneath (btw, there is A LOT of friction between 4 and 5. Heat from this friction creates new magma; friction is the cause of Japan's volcanoes like Mt. Fuji!) Crust at "4" pulls downhill on crust at "3". The downhill pull at a subduction zone is the other gravity-caused force that helps move a tectonic plate. Question: is crust at "4" pulling downhill on "3" ridge push or slab pull? * continent marginal basin island arc SUBDUCTION ZONE trench mid-ocean ridge accretionary wedge sediments 2. ASTHENOSPHERE

Still more on ocean crust and density: the subduction zone near location "4" is where plate motion is pushing old, cold ocean crust (4) and continent crust (5) together. The ocean crust is the more dense, so it moves underneath (btw, there is A LOT of friction between 4 and 5. Heat from this friction creates new magma; friction is the cause of Japan's volcanoes like Mt. Fuji!) Crust at "4" pulls downhill on crust at "3". The downhill pull at a subduction zone is the other gravity-caused force that helps move a tectonic plate. Question: is crust at "4" pulling downhill on "3" ridge push or slab pull? * continent marginal basin island arc SUBDUCTION ZONE trench mid-ocean ridge accretionary wedge sediments 2. ASTHENOSPHERE

Applications and Investigations in Earth Science (9th Edition)
Applications and Investigations in Earth Science (9th Edition)
9th Edition
ISBN:9780134746241
Author:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Publisher:Edward J. Tarbuck, Frederick K. Lutgens, Dennis G. Tasa
Chapter1: The Study Of Minerals
Section: Chapter Questions
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Still more on ocean crust and density: the subduction zone near location "4" is where plate motion is pushing old, cold ocean crust (4) and continent crust (5) together. The ocean crust is the more dense, so it moves underneath (btw, there is A LOT of friction between 4 and 5. Heat from this friction creates new magma; friction is the cause of Japan's volcanoes like Mt. Fuji!) Crust at "4" pulls downhill on crust at "3". The downhill pull at a subduction zone is the other gravity-caused force that helps move a tectonic plate. Question: is crust at "4" pulling downhill on "3" ridge push or slab pull? * continent island arc SUBDUCTION ZONE marginal basin mid-ocean ridge trench 2. accretionary wedge sediments ASTHENOSPHERE
Transcribed Image Text:Still more on ocean crust and density: the subduction zone near location "4" is where plate motion is pushing old, cold ocean crust (4) and continent crust (5) together. The ocean crust is the more dense, so it moves underneath (btw, there is A LOT of friction between 4 and 5. Heat from this friction creates new magma; friction is the cause of Japan's volcanoes like Mt. Fuji!) Crust at "4" pulls downhill on crust at "3". The downhill pull at a subduction zone is the other gravity-caused force that helps move a tectonic plate. Question: is crust at "4" pulling downhill on "3" ridge push or slab pull? * continent island arc SUBDUCTION ZONE marginal basin mid-ocean ridge trench 2. accretionary wedge sediments ASTHENOSPHERE
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